New Zealand Gazette – 1927 – No. 67

Page 3022

✨ Maritime Examination Papers



3022
THE NEW ZEALAND GAZETTE.
[No. 67

  1. Having taken the following compass bearings of a distant object,
    find the object’s magnetic bearing and thence the deviation :—

MAGNETIC BEARING REQUIRED.

Ship’s Head by Standard Compass Bearing of Distant Object by Standard Compass Deviation required Ship’s Head by Standard Compass Bearing of Distant Object by Standard Compass Deviation required
North N34°W South N66°W
NE N47°W SW N49°W
East N64°W West N36°W
SE N73°W NW N31°W

  1. With the deviations as above, construct a curve of deviations on
    a Napier’s diagram, and give the courses you would steer by
    the standard compass to make the following courses, magnetic :
    Magnetic courses—NNE, SE by E, WSW, NW by W.
    Compass courses required.

  2. A ship’s mast measures vertically 124 ft. from trunk to water-line.
    Required—The angle to which a sextant must be set for
    another ship to maintain station on her at a distance of one
    cable, height of observer’s eye being 30 ft.

  3. Draw a figure and prove that $\frac{1}{\sqrt{1 + \cot^2 A}} = \sqrt{1 - \frac{1}{\sec^2 A}}$

**3. GREAT-CIRCLE SAILING.***

Time allowed 2 hours.

Find the initial course and distance on the arc of a great circle
from Y to Z: Lat. of Y, 34° 10′ S.; long. of Y, 25° 42′ E. Lat. of Z,
20° 00′ S.; long. of Z, 105° 10′ E.

Find the latitude and longitude of vertex and the latitude at which
the track of the great circle intersects the meridians, passing through
the 40th degree of east longitude and every 20° of longitude in succession
until arriving at Z. Explain briefly how the course and distance from
one point to another is then found.

4. COMPASS DEVIATION.

Time allowed 1½ hours.

Diagrams should be drawn where necessary to illustrate the answers.

  1. What is meant by “deviation,” and how would you determine
    whether the deviation was easterly or westerly ?

  2. Describe the meaning of the term “semicircular deviation,” stating
    by what coefficients it is represented, and how you determine
    when they are plus (+) and when minus (—).

  3. State clearly what rules must be observed when placing compensating-magnets and soft iron to correct a compass, and what
    may be the result if these rules are not observed.

  4. If coefficient B be corrected by means of a permanent magnet only,
    would you expect the compensation to remain correct when
    the ship changes her magnetic latitude? State your reasons.

  5. Supposing that it is possible for you to move your correcting-magnets, describe how, on the open sea, you would proceed to
    adjust your compass.

  6. If a ship is beating to windward when she tacks, under what
    circumstances will the heeling-error retain the same name,
    and under what circumstances will it take the contrary name ?

5. NAVAL ARCHITECTURE AND STABILITY.

Time allowed 1½ hours.

  1. What are the chief functions of the garboard strake, and how is it
    fitted to a (a) flat plate keel, (b) side bar keel, (c) bar keel ?

  2. Describe how transverse bulkheads are plated, stiffened, and
    connected to the shell plating, and how they are made watertight.

One of these papers will be omitted.



Next Page →

PDF embedding disabled (Crown copyright)

View this page online at:


VUW Te Waharoa — PDF NZ Gazette 1927, No 67


NZLII — PDF NZ Gazette 1927, No 67




✨ LLM interpretation of page content

🚂 Specimen Set of Examination-papers for Master (F.G.) (continued from previous page)

🚂 Transport & Communications
Maritime, Examination, Navigation, Nautical Astronomy, Chart, Meteorology, Compass Deviation, Great-Circle Sailing, Naval Architecture, Stability